401405503161 has 16 divisors (see below), whose sum is σ = 578218610816. Its totient is φ = 246229566336.

The previous prime is 401405503099. The next prime is 401405503181. The reversal of 401405503161 is 161305504104.

It is a happy number.

It is not a de Polignac number, because 401405503161 - 2⁹ = 401405502649 is a prime.

It is a super-2 number, since 2×401405503161² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401405503181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16429405 + ... + 16453818.

It is an arithmetic number, because the mean of its divisors is an integer number (36138663176).

Almost surely, 2^401405503161 is an apocalyptic number.

It is an amenable number.

401405503161 is a deficient number, since it is larger than the sum of its proper divisors (176813107655).

401405503161 is a wasteful number, since it uses less digits than its factorization.

401405503161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32883552.

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 401405503161 in words is "four hundred one billion, four hundred five million, five hundred three thousand, one hundred sixty-one".